Barking drum



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Jan. 10, 1928. 1,655,628

C. ROYEM BARKING' DRUM Filed Nov. 15. 1926 4 Sheets-Sheet 3 Jan. 10,1928. 1,655,628

. c. ROYEM BARKING DRUM Filed/310mm. 1926 4 Sheets-Sheet 4 the bark fromform, when the drum is rotated, logs slides within the drum,

While this form of drum Patented Jan, 19,

UNITED STA .TLLINQIS, ASSIGNOE TO HERBERT VI. GUETTLER, OF

GAR-STEIN BOYEM, 0J3 OHTGAGO,

. I CHICAGO, ILLINOIS.

Application filed November 15, 1926.

This invention relates TES BAR/KING DRUM.

to barking apparatus, and more particularly to barking drums. There arethree general forms of construe tion of barking drums which briefly inconnection One form employs I will discuss with my invention.

bars of angle cross-sec tion, or a combination of. angle bars andchannel bars, which are mounted within the drum with their sid thereof.This form has it-canses excessive splitting unsatisfactory as andbrooining of the log objection.

The tion has channel cent each other bars to le es directed inwardlybeen found to he s, which is a serious second form of drum underconsideramounted closely adjaave between the bars narrow openings orslots for escape of the removed bark, the open outwardly of the beingdisposed the base or bight portions drum radially thereof. This theinner surface of which inwardly of the produces a drum,

faces of the bars drum and being directed is practically continuous sofar as tumbling the logs or In the third form of drum, the

having any effect in removing the logs is concerned.

In this the mass of without posi of excessive splitting logs, its outputis, as

greatly limited.

removal of the bark is efiected by the combined action of the logsrubbing together and the bars of the drum acting upon of drum isillustrated bert TV. Guettler, 1,311,226, for barking the logs. Thisform in the patents to Hernunibered 1,811,225 and drum, issued'July 29,

1919. In this form the bars are of skeleton formation and U-shape Thesebars are spaced in cross-section.

an appreciable distance apartto form pockets permitting the corners ofand the bight portion posed inwardly of, and are smooth a of the thelogs to be engaged by the bars,

s of the bars are disdruni radially therend rounded.

rotation of the drum the logs are subjected to a positive rolling andare caused to strike upon the rounded inner portions This serves to veryquickly the bark and remove i action is supplements tumbling action andslide over of the bars. break and loosen t froin the logs. This d by"the rubbing t0- and of the type disclosed in or jamming thereof.

During Serial m. 148,411.

gether of the logs so as to quickly rub off any adhering particles ofbark. This drum thus combines all of the desirable features of the drumsofthe first two avoiding the objections to such drums, and has theadditional advantage of light but strong and durable construction. 7

The type of drum disclosed in the Guettler Patent- 1,311,226 aboveidentified has been found to be highly efficient in use, but is subjectto one objection. The logs which are ordinarily barked in drums vary inlength from two to four feet, being occasionally in excess of four feetin length, the drumsbeing, say, ten or twelve feet in diameter. It hasbeen found that logs of certain lengths will sometimes wedge or jamendwise between the bars of a drum the Guettler Patent 1,811,226. Thisis due to the shape of the U- bars and the relation between the coinple'nientary faces of these bars/ I have found that by constructing andarranging the bars in a certain way, it is possible to produce a barkingdrum which will thoroughly bark logs of any length, between thepractical limits, without any wedging My drum thus combines all theadvantages of the third type of drum above discussed with the additionaladvantage of eliminating wedging or janimiiig of the logs.

In order to more clearly illustrate the differences and advantages of mydrum over the Guettler drum, I have shown several diagrams of U-bars asused in the two drums,

respectively.

' In the drawings 2-- Fig. 1 is a diagram of two of the bars of theGuettler drum, illustrating the relation between the U-bars;

Fig. 2 is a diagram enlarged;

.Fig. 3 is a fragmentary sectional view of the Guettler drum,illustrating the positions assumed by logs of different lengths;

Fig. 1 is a diagram of two of the bars showing a log jammed betweenthem;

Fig. 5 is a diagram of two of the U-bars of my drum illustrating therelation between the bars;

Fig. 6 is a diagram of one of the bars of my drum of one of the U bars,

types while Fig. 7 is a side elevation of a drum con structed inaccordance with my invention;

Fig. 8 is a fragmentary sectional View of my drum illustrating thepositions assumed by the logs;

Fig. 8 is a diagram showing the angle between the end of a log ofextreme length a id the side of a bar of my drum;

Fig. 9 is a fragmentary perspective detail of the construction ofniydrum.

Referringto Figs. 1 and 2 of the drawings, it willbe noted that theopposed faces a of adjacent ll bars a of the drum A (which is from tento twelve feet in diameter) are disposed at an angle of approximately toeach other, and that the faces a of each ti -bar are disposed at anangle of approximately to each other and at an angle of approximately 2:to the radius ej of the drum.

The bars a are of skeleton f .rniation, being constructed preferably ofrolled steel. In practice the drum is from ten to twelve feet indiameter, as before indicated, and is filled about half full of logs bebarked, the drum being; rotatably su ported and rotated in any suitableor prei rred manner, several of which are well known in this art. It hasbeen found that some logs of certain lengths will wedge or jam endwisebetween the bars of this drum. This is due to the followingz-The angleof the sides of the bars is such, as experience has shown, that logs ofcertain lengths can and sometimes do become jammed between complementaryfaces thereof as shown in the instance of the longest log in Fig. 3. Asshown in. F 4, the ends of the log are actually deformed in this jammingaction, particularly when the weight of other logs on top of it isimposed. thereon, and under these circum stances the log becomes sotightly lodged as to require extraneous means to dislocate it. Obviouslyoperating eiliciency of the drum is seriously interfered with, by logsjam ining in the manner stated.

In constructing my drum, the bars have their sides 2 disposed at anangle of approx:- imately 90 to each other, the angle between the outerface of each side and the radius a?) of the drum being approximately 45.In my bar the angle between each of the sides2 and the radius a-5 ismuch greater than 25 as in the case of the Guettler bar above discussed,being approximately 45 as shown in Fig. though this angle can be variedwithin certain limits provided it is suliicicnt to produce a relievingangle be tween the complementary faces of the bars and the ends of thelog. In a ten or twelve footdrum, for instance, bars of this type wouldlie with adjacent faces approximately to each other, as shown in 5'.

I have found this angle of 45 to the radius suficiently great, in a drumhaving an interior diameter of ten feet, to be relieving for logs of alength somewhat more than live feet, which is ample as it is veryexceptional to bark logs five feet long in a drum. By relieving I meanthat, with tacting with two complementary bar faces, the angle betweenthe face of the bar and the log, end contacting with it diverges towardthe drum center and is such as to prevent jann'ning of the log,permitting the log to readily move from between the bars on continuedrotation of the drum. This will be clear from 8, Fig. 8 showing thedecided angle in the of the longest log. In fact, only the edge of thelog end con- (acts with the inclined i'face of the bar. This 'nates allpossioility ofjaniming and yet re the desirable positive tuniblingaction hereinbefore referred to.

will be upureciatcd that it is within the broad aspects or my inventionto dispose but one side of the bars this relieving angle, it beingobvious that relief of a log; at one end or ild be relied-upon. 'By this'1 also within the bread as t .ion to make alternate bars cs at renevingangles and the re- 7 hing; ones with the non-relieving angles of "ieprior art.

In actual construction each of the bars 1 is pro 'ided at each outeredge with an outvardl extending base flange 4. The drum includes thebars 1, the flanges a of which y riveting, or in any other suitrredmanner, to annular hoops 5 of angle or anyother ferred oross-section.The n parallel relation and are spaced an ap oreciable distance apart toprovide pockets between the bars of proper breadth to ensure tl* it thebars will contact with the ends of the logs for positively tumbliug themduring rotation of the drum. At suitable intervals I provide pairs ofangle hoops 6 arranged with their flights projecting outwardly from thedrum and disposed opposite and adjacent each other, Solid rings 7 arepositioned between the opposed flights of the pairs of hoops 6, therings and the flights of the hoops beingsecured together by riveting; orin any other preferred manner. The hoops 6 are secured to the barsl inthe same manner as hoops and the rings may be made to travel uponsupporting rollers ar ranged in a known manner for rotatably supportingthe drum. The drum may be rotated by means of driven pinions (not shown)meshing with a gear ring 8 secured to the drum in the same manner as therings 7 are secured. I also contemplate supportbars are disposed ing anddriving the drum by chains, or in any other suitaole or preferred mannerwell known in this art.

l claim l 1'. In a barking apparatus, a rotatable a log consuitable orpreltll) drum, and a plurality of tumbling devices mounted within thedrum and spaced apart an appreciable distance forming pockets forcatching the corners of logs for tumbling the same, said devices havingtheir lateral faces inclined toward each other inwardly of the drum, theangle between said inclined faces being appreciably greater than 50,

2. In a barking apparatus, a rotatable drum, and a plurality of tumblingdevices mounted within the drum and spaced apart an appreciable distanceforming pockets for catching the corners of logs for tumbling the same,the angle between the complementary faces of said devices beingrelievingto prevent jamming of the logs.

3. In a barking apparatus, a rotatable drum, and a plurality of tumblingd'vices mounted within the drum and spaced apart an appreciable distanceforming pockets for catching the corners of logs for tumbling the same,the angle between the opposed faces of adjacent devices beingappreciably greater than 45.

4:. In a barking apparatus, a rotatable drum and a plurality of tumblingdevices mounted within the drum and extending in \vardly thereof, atleast one lateral face of the respective tumbling devices being disposedat an angle appreciably greater than to a radius of the drumintersecting the apex of said device.

In a barking apparatus, a drum for barking logs of from two toapproximately live feet in length, said drum including a plurality ofspaced U-bars extending in.- wardly of the drum and each having a sideface inclined to a radius of the drum intersecting the apex of the bar,the angular relation between the side face to said radius being suchthat the angle between the end of a log contacting with said side faceand the con pleinentary face of a cooperating bar diverges toward thecenter of the drum.

6. In a barking apparatus, a drum for barking logs of from two toapproximately five feet in length, said drum including a plurality ofspaced U-bars extending inwardly of the drum and each having a side faceinclined to a radius of the drum intersecting the apex of the bar, theangular re- CARSTEN ROYEM.

